Charles a



(No Model.)

0. A. SWANSON.

. WRENCH.

No. 410,384. Patented Sept. 3, 1889.

W/T/VESSES. INVENTOR:

e/fiwm ATTORNEYS.

UNITED STATES PATENT ()FFICE.

CHARLES A. SWVANSON, OF MARSHALL, MINNESOTA, ASSIGNOR TO HIMSELF AND CHARLES LAUDENSLAGER, OF SAME PLACE.

WRENCH.

" SPECIFICATION forming part of Letters Patent No. 410,384, dated September 3, 1889.

' Application filed April 20, 1889- Serial No. 307,972. (No model.)

To all whom, it may concern: ends it Z of the jaws B C may either be con- Be it known that 1, CHARLES A. SWANSON, cave or straight on their gripping-surfaces, of Marshall, in the county of Lyon and State or of any other desired shape, but are here of Minnesota, have invented a new and useshown concave to adapt them topipe and ful Improvement in \Vrenches, of which the other like work, and said surfaces, which are following is a full, clear, and exact descriphere shown serrated, may either be plain or tion. serrated, the one or both of them. The jaw This invention relates to selfadjusting B is provided with a shoulder m, whiclnwhen wrenches; and it consists in anovel eonstructhe jaws are fully open, bears against a shoul- 10 tion and combination of parts, substantially der n on the handle, as shown in Fig. 1. When i as hereinafter described, and pointed out in the parts are in the position represented in the claim. Fig. 1, then by suitably swinging the handle The wrench is not restricted to any par- A about the pivot-pin f as a center the rack ticular class of work, but may be used either portion 1) of the handle will by its engage- 15 asa pipe-wrench or as a monkey-wrench. ment with the pinion portion 9 of the mov- Reference is to be had to the accompanying able jaw O operate said jaw to close it, and so drawings, forminga part of this specification, grip the work in between it and the jaw 13, in which similar letters of reference indicate and by continuing to bear upon the handle in corresponding parts in both the figures. a like direction the article or work being 20 Figure 1 represents a side view of a wrench gripped may be turned by it in common with embodying my invention, an outer plate, the wrench, which, as it will be seen, is selfforming a part of what may be termed the adjusting or requires no setting of it to its stationary jaw, being removed; and Fig. 2 work. This forms a strong, handy, and conis a longitudinal edge view of the same-=that venient form of self-adjusting wrench that z 5 is, a longitudinal view in a plane at right anmay not only be worked with ease, but gives gles to Fig. 1. a Very powerful grip by reason of the pun The wrench is mainly composed of three chase or leverage which it exerts upon the leading parts-that is to say, a handle A, a movable jaw. stationary jaw B, and a movable jaw O. The To provide for holding the wrench at any 0 handle A is constructed with a fiat circular particular adjustment, and so that when ad portion 1) at its inner end formed by recessj usted to nut or other work it can be turned ing the handle on its opposite sides, and such either to the right or to the left without talc flat portion is provided on its forward part ing it off the work and can be moved bodily with any number of teeth 0, and virtually round in either direction, I provide the han- 3 5 constitutes a circular rack on the front end die A with a longitudinally-arranged lever D 8 5 of the handle. What is termed the stationalong its back or one side, said lever being aryjawB is constructedwith two side cheeks, fulcrumed intermediately of its length, as at the one of which is in the form of a remov- 0, to the handle, and being provided at its forable plate d, secured, as by screws or pins e, to ward end, with a tooth '1', which, by means of a 0 the other side check or part. It is also conspring 5 of any suitable description applied nected with the circular rack portion 12 of the to said lever, is made to engage with a rackhandle by a central pivot-pin f, and is relike or serrated portion it upon the jaw 13, cessed to receix e within it a mutilated pinion thus, and by the connection of the handle and portion 9 of the movable jaw 0, having any the two jaws with one another, as described,

5 number of teeth h, that engage with the teeth looking or holding the wrench to its self-ad- 5 c of the circular rack portion bof the handle, justment. The rear or longer arm of this said movable jaw being fitted to turn by its lever D, however, is pressed inward against mutilated pinion portion 9 about a pivot-pin the pressure of the spring 8 when it is re- 2', passing through said portion g and the side quired to release the catch or tooth "r from the I 50 cheeks of the jaw B. The claw or gripping serrated portion a when the wrench is first 10o rack, the pivot '5, connecting the pinion portion of the movable jaw with the jaw B, and the lever D, fulcrnmed on the handle provided with a tooth 1", arranged to engage with the rack-like or serrated portion a of the jaw B, and the spring 8, controlling said lever, essentially as and for the purposes herein set forth.

CHARLES A. SWV'ANSON.

WVitnesses:

J OHN J. LAUDENSLAGER, VIRGIL B. SEWARD. 

